问题
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Where are the two rulers? They are ______.A.in the pencil-boxB.at homeC.in the desk
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A.There are none left.B.They are too expensive.C.They might be available at the concer
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They are sweating all over. They ______ in the field.A.may beB.must have been workingC.cou
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"They vault over technical fixes as fast as the hurdles are erected"(Para. 1)probably mean
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Television ads are short ,but they are repeated over and over again _____ the audien
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All over the world forests are safeguarding the health of the planet itself. They do this
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